Spiral bed-spring



W. E. FRANK.

SPIRAL BED SPRING.

APPLICATION FILED MAR. H.1919.

1,327,231 Patented Jan. 6.1920.

l erase arsr more,

WILLIAM E. FRANK, OF ST, LOUIS, MISSOURI, ASSIGNOB TO FOSTER BROS. MFG. 00., OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

SPIRAL BED-SPRING.

To all whom it may concern:

Be it known that 1, WILLIAM E. FRANK, a citizen of. the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Spiral Bed- Springs, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertainsto make and use the same.

This invention relates to spiral bed springs, and has for its main object to provide a spiral bed spring that can be used either with wooden beds or with metal beds.

Another object is to provide a spiral bed spring which is equipped with side rail engaging members that are capable of moving sufliciently relatively to the frame of the bed spring to compensate for slight inequalities in the width of metal beds.

Figure 1 of the drawings is a transverse sectional view of a spiral bed spring constructed in accordance with my invention, showing the spring used on a metal bed.

Fig. 2 is a transverse sectional view of my improved bed spring, showing the spring used on a wooden bed.

Fig. 3 is a top plan view of a portion of the bed spring shown in Fig. 1; and

Fig. 4c is a top plan-view of a portion of the bed spring shown in Fig. 2.

Referring to the drawings which illustrate the preferred form of my invention, A designates a spiral bed spring composed of a plurality of spiral springs 1 and a sup porting frame for said springs comprising a plurality of transversely-disposed members 2 secured at their outer ends to' the side pieces of a rectangularly-shaped frame 3. Said bed spring A is provided with side rail engaging members B that are adapted to be arranged in an operative position, as shown in Figs. 1 and 3, to cooperate with the side rails C of a metal bed so as to support or sustain the spring A in operative position on said side rails. The side rail engaging members B can also be arranged in an inoperative position, as shown in Figs. 2 and 4, when the bed spring A is used on a wooden bed. When the bed spring is used on a wooden bed the frame 3 of said spring rests upon the usual transversely-disposed slats 4: of

Specification of Letters Patent.

Application filed March 11, 1919.

PatentedJ an. 6, 1920.

Serial No. 281,902.

the bed which rest upon cleats 5 connected to the side members 6 of the bed, as shown in Fig. 2.

The side rail engaging members B can be constructed in various ways without departing from the spirit of my invention, but I prefer to make said members substantially hook shaped and 'pivotally connect them to the cross members 2 of the frame of the bed spring A in such a manner that said members B project laterally from the spring A from two light-weight metal bars or pieces of strap iron, each bent into substantially 2 form and having their outer ends connected together by a cross piece 7 preferably formed from a piece of angle iron arranged with its vertical flange projecting downwardly so as to form a downward extension or flange at the outer end of the member B. The members B can be connected to the frame of the bed spring A in any suitable manner that will permit said members to be extended or moved into an operative position when the spring is used on a metal bed and folded inwardly or arranged in an inoperative position when the bed spring is used on a wooden bed. I prefer, however, to connect the members B to the cross pieces 3 of the frame of the bed spring by means of links 8, so as to permit said side rail engaging members B to move inwardly and outwardly sufiiciently with relation to the frame of the bed spring A to compensate for slight variations in the width of metal beds, and thus permit the members B to adjust themselves to the side rails C of the particular bed on which the spring A is used. In other words, the links A not only serve to pivotally connect the inner ends of the members B to the frame of the bed spring A, but they also permit a slight lateral adjustment of said members inwardly and outwardly without canting the members B or causing them to assume such a position that they will not rest evenly on the top sides of the side rails C of the bed.

From the foregoing it will be seen that I have produced a spiral bed spring that can be used on either wooden or metal beds and which is so constructed that it will restsquarely and evenly on metal beds of various makes, due, of course, to the fact that the side rail engaging members B are capable of moving inwardly and outwardly sufficiently with relation to the frame of the bed spring to compensate for a slight variation in the distance between the side rails C of the bed.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

In a bed bottom having side pieces connected by transverse members, hook-shaped members adapted to support the bed bottom upon the side rails of a bedstead, said members passing under and afi'ording a rest for said side pieces, and links pivoted to said transverse members and to said hook-shaped members, said links adapted to swing in vertical planes and constituting means whereby said bed bottom is adapted for support on bedsteads of different widths.

WILLIAM E. FRANK. 

